WO2019228488A1 - Système et procédé d'affichage tête haute, véhicule, dispositif d'affichage tête haute, et support de stockage lisible par ordinateur - Google Patents

Système et procédé d'affichage tête haute, véhicule, dispositif d'affichage tête haute, et support de stockage lisible par ordinateur Download PDF

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Publication number
WO2019228488A1
WO2019228488A1 PCT/CN2019/089439 CN2019089439W WO2019228488A1 WO 2019228488 A1 WO2019228488 A1 WO 2019228488A1 CN 2019089439 W CN2019089439 W CN 2019089439W WO 2019228488 A1 WO2019228488 A1 WO 2019228488A1
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Prior art keywords
polarized light
linearly polarized
display
head
image
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PCT/CN2019/089439
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English (en)
Chinese (zh)
Inventor
洪涛
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BOE Technology Group Co Ltd
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BOE Technology Group Co Ltd
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Priority claimed from CN201811142801.6A external-priority patent/CN109298529A/zh
Application filed by BOE Technology Group Co Ltd filed Critical BOE Technology Group Co Ltd
Priority to EP19811615.4A priority Critical patent/EP3805843B1/fr
Priority to US16/633,599 priority patent/US11320901B2/en
Publication of WO2019228488A1 publication Critical patent/WO2019228488A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/011—Arrangements for interaction with the human body, e.g. for user immersion in virtual reality
    • G06F3/013—Eye tracking input arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/10—Input arrangements, i.e. from user to vehicle, associated with vehicle functions or specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
    • B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
    • B60K35/22—Display screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
    • B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
    • B60K35/23—Head-up displays [HUD]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • B60K35/60—Instruments characterised by their location or relative disposition in or on vehicles
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
    • G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/1523—Matrix displays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/20—Optical features of instruments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/20—Optical features of instruments
    • B60K2360/23—Optical features of instruments using reflectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/20—Optical features of instruments
    • B60K2360/25—Optical features of instruments using filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/20—Optical features of instruments
    • B60K2360/29—Holographic features
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B27/0103—Head-up displays characterised by optical features comprising holographic elements
    • G02B2027/0105—Holograms with particular structures
    • G02B2027/0107—Holograms with particular structures with optical power
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B2027/011—Head-up displays characterised by optical features comprising device for correcting geometrical aberrations, distortion
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B2027/0123—Head-up displays characterised by optical features comprising devices increasing the field of view
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
    • G02B27/286—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another

Definitions

  • the present disclosure relates to a heads-up display system and display method, a vehicle, a heads-up display device, and a computer-readable storage medium.
  • Head-up display also known as head-up display
  • the head-up display projects the information displayed by the instrument (such as speed information) and navigation information on the front windshield during the driving of the car, so that the driver can see the information in the instrument without looking down, which not only helps to lack experience in speed judgment Newbies control their speed, avoid violations of speeding rules in many speed-limit sections, and enable drivers to take instant readings under conditions that do not shift the field of vision, always keeping their heads in the best observation state and avoiding Look down at the meter display or the audio display and ignore the safety hazards caused by the rapid changes in the external environment.
  • users have increasingly higher requirements for the field of view of the head-up display system, and a large field of view has become a development trend of the head-up display system.
  • Some embodiments of the present disclosure provide a head-up display system including a display control module configured to output a first linearly polarized light for displaying a first image during a first period, and output a second for displaying a second period during a second period.
  • a polarizing beam splitting element disposed on the light exit path of the display control module is configured to deflect a propagation direction of the first linearly polarized light by a first angle to make the second linearly polarized light The propagation direction of is deflected by a second angle, and the first angle is different from the second angle.
  • the display control module is configured to alternately arrange a first period during which the first linearly polarized light is output and a second period during which the second polarized light is output.
  • the sum of the adjacent first and second periods is less than or equal to the response time of human vision persistence, and the output frequencies of the first and second periods are greater than or equal to human vision
  • the refresh rate is doubled.
  • the display control module includes: a display component configured to display the first image during the first period and display the second image during the second period; and disposed on the display component A first polarization conversion element on the image display side of the, configured to convert the light of the first image into a first linearly polarized light during the first period, and convert the light of the second image during the second period And converted into second linearly polarized light, and the vibration directions of the first linearly polarized light and the second linearly polarized light are perpendicular to each other.
  • the head-up display system further includes at least one mirror disposed on an optical path between the display control module and the polarization beam splitting element for changing the first linearly polarized light and the second linearly polarized light The direction of light propagation.
  • the mirror includes at least one of a flat mirror, a spherical mirror, an aspherical mirror, or a free-form mirror.
  • the head-up display system includes a non-planar mirror; or, the head-up display system includes at least two of the mirrors, including at least one non-planar mirror.
  • the polarization beam splitting element includes a polarization beam splitting prism
  • the polarization beam splitting prism includes two right-angle prisms whose optical axis directions are perpendicular to each other.
  • the polarization beam splitting element includes one polarization beam splitting prism; or the polarization beam splitting element includes at least two polarization beam splitting prisms, and at least two polarization beam splitting prisms are superimposed, and two Right-angled prisms with the same optical axis direction are in contact with each other.
  • the head-up display system further includes a first optical element disposed on the optical path of the first linearly polarized light after the deflection, and a second optical element disposed on the optical path of the second linearly polarized light after the deflection.
  • the first optical element is configured to reflect the first linearly polarized light to a human eye
  • the second optical element is configured to reflect the second linearly polarized light to a human eye.
  • the first optical element and the second optical element include a holographic optical element.
  • the first optical element and the second optical element are disposed on a windshield or a synthesizer of a vehicle in which the head-up display system is located.
  • the display control module further includes an image rendering component connected to the display component and configured to output the first image during the first period and output the first image during the second period. Two images.
  • the display control module further includes a system control component connected to the image rendering component and the first polarization conversion element, and configured to control the image rendering component to output the first image and the The timing and frequency of the second image, and controlling the first polarization conversion element to perform polarization conversion on the light of the first image and the light of the second image.
  • a system control component connected to the image rendering component and the first polarization conversion element, and configured to control the image rendering component to output the first image and the The timing and frequency of the second image, and controlling the first polarization conversion element to perform polarization conversion on the light of the first image and the light of the second image.
  • the display control module further includes an aberration compensation circuit, the aberration compensation circuit is respectively connected to the system control component and the image rendering circuit, and is configured to compensate for Aberration introduced by the light angle changing element, and an aberration compensation signal is input to the image rendering component.
  • the display control module further includes a collimator disposed on a light exit side of the display component and configured to collimate light emitted from the display component.
  • the light angle changing element includes At least one of the polarization beam splitting element and the collimator.
  • the head-up display system further includes a second polarization conversion element disposed on the light-emitting side of the polarization beam splitting element; the second polarization conversion element is configured to convert the first linearly polarized light into The second linearly polarized light or the second linearly polarized light is converted into the first linearly polarized light.
  • the second polarization conversion element is further configured to: under the control of the display control module, in the first period of time, the first linearly polarized light emitted from the polarization beam splitting element is The polarization direction is changed to the same polarization direction as the second linearly polarized light, and the polarization direction of the second linearly polarized light emitted from the polarization beam splitting element is not changed during the second period; or, during the first period The polarization direction of the first linearly polarized light emitted from the polarization beam splitting element is not changed, and the polarization direction of the second linearly polarized light emitted from the polarization beam splitting element is changed to be the same as the polarization direction in the second period.
  • the first linearly polarized light has the same polarization direction.
  • Some embodiments of the present disclosure provide a head-up display method, including a plurality of display periods, each of which includes a first period and a second period, wherein, during the first period, a first image to be displayed is output
  • the required first linearly polarized light deflects the propagation direction of the first linearly polarized light by a first angle, and reflects the first linearly polarized light to the human eye; in the second period, outputs the intended display
  • the second linearly polarized light required for the second image deflects the propagation direction of the second linearly polarized light by a second angle, reflects the second linearly polarized light to the human eye, the first angle and the second angle different.
  • the first and second angles in which the first linearly polarized light and the second linearly polarized light are deflected are different, so that the display areas of the first image and the second image are different and Arranged in a predetermined direction.
  • the predetermined direction is a direction parallel or perpendicular to a line connecting the eyes of the user.
  • the time of each display cycle is less than or equal to the response time of human vision persistence, and the output frequency of the first period and the second period is greater than or equal to the refresh of human vision persistence. Twice the frequency.
  • the method further includes the first linearly polarized light The polarization direction of is changed to the same polarization direction as the second linearly polarized light; or, in the second period, after the propagation direction of the second linearly polarized light is deflected by a second angle and reflected to the human eye, The method further includes changing a polarization direction of the second linearly polarized light to the same polarization direction as the first linearly polarized light.
  • Some embodiments of the present disclosure provide a vehicle including the head-up display system according to any one of the above.
  • Some embodiments of the present disclosure provide a head-up display device including: a memory configured to store non-transitory computer-readable instructions; and a processor configured to run the non-transitory computer-readable instructions, wherein When the non-transitory computer-readable instructions are executed by the processor, the head-up display method according to any one of the foregoing is performed.
  • Some embodiments of the present disclosure provide a computer-readable storage medium for storing non-transitory computer-readable instructions, and when the non-transitory computer-readable instructions are executed by a computer, the head-up display according to any one of the foregoing is performed. method.
  • FIG. 1 is a schematic structural diagram of a head-up display system according to an embodiment of the present disclosure
  • FIG. 2 is a schematic structural diagram of a polarization beam splitting element according to an embodiment of the present disclosure
  • FIG. 3 is a schematic structural diagram of another polarization beam splitting element according to an embodiment of the present disclosure.
  • FIG. 4 is a flowchart of a head-up display method according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic diagram of a display image observed by a driver applying a head-up display system provided by an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram of another display image observed by a driver applying a head-up display system provided by an embodiment of the present disclosure
  • FIG. 7 is a schematic structural diagram of a head-up display system according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a head-up display system after a second polarization conversion element is added according to an embodiment of the present disclosure
  • FIG. 9 is a schematic diagram of another display image observed by a driver of a head-up display system according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic diagram of another display image observed by a driver applying a head-up display system provided by an embodiment of the present disclosure
  • FIG. 11 schematically illustrates the deflection of the light after the s-polarized light passes through the optical path separator and the second polarization conversion element in the first period;
  • FIG. 12 schematically illustrates the deflection of the p-polarized light after passing through the optical path separator and the second polarization conversion element in the second period;
  • FIG. 13 schematically illustrates a case where a driver's field of view is enlarged by time division multiplexing of a polarization state
  • FIG. 14 shows the relationship between the reflectance and the incident angle of P-polarized light and S-polarized light
  • FIG. 15 schematically illustrates a head-up display device provided by an embodiment of the present disclosure.
  • a 2D display image is usually projected to a fixed distance in front of the driver.
  • the driver needs to adjust the focal length of the eyes to make the human eyes converge.
  • the head-up display system in the related technology uses a dual projection technology solution, and the display screen is divided into status information and augmented reality display information.
  • Status information refers to vehicle status such as vehicle speed, oil temperature, water temperature, etc.
  • augmented reality information such as instructions from external objects, navigation instructions, etc.
  • the far distance of the eyes of the crew such as 5 to 8 meters, such a distance does not require the human eye to adjust the focal distance significantly, and it is more comfortable to watch.
  • the projection distance of the augmented reality information is relatively long.
  • the mirrors in the head-up display system are mostly free-form surfaces, it is difficult to manufacture large-caliber free-form mirrors, and the large-caliber mirrors make the head-up display system larger in size. The above factors limit the large field of view. Looking up to show the development of the system.
  • the technical solution of the present disclosure proposes a head-up display system and a display method, which uses a polarization beam splitting element to deflect light, and adopts a time-division multiplexing method to achieve a larger field of view display of the head-up display system.
  • an embodiment of the present disclosure discloses a head-up display system.
  • the head-up display system can display a first image 51 and a second image 52 in each display period.
  • Each display period includes a first period and a second period. Time period.
  • the head-up display system includes a display control module 1 and a polarization beam splitting element 3.
  • the display control module 1 is configured to output the first linearly polarized light P required for the first image 51 during the first period and the second linearly polarized light S required for the second image 52 during the second period; the polarization beam splitting element 3 is arranged on the display
  • the light output path of the control module 1 is configured to deflect the propagation direction of the first linearly polarized light P by a first angle and deflect the propagation direction of the second linearly polarized light S by a second angle; the first linearly polarized light P and the The second linearly polarized light S is used to display the first image 51 and the second image 52, respectively.
  • the first angle and the second angle are different.
  • the display control module 1 outputs the first linearly polarized light P and the second linearly polarized light S according to the timing in different periods.
  • the first linearly polarized light P and the second linearly polarized light S pass through the polarization beam splitting element 3, and the light The propagation angle is deflected, and the first linearly polarized light P and the second linearly polarized light S after being deflected can display the first image 51 and the second image 52 at different positions after exiting from the polarization beam splitting element 3, respectively.
  • the polarizing beam splitting element 3 is used to generate different light deflection angles for the first linearly polarized light P and the second linearly polarized light S, which provides a prerequisite for the subsequent display of the image using the time division multiplexing method.
  • the display control module 1 controls the output timing and frequency of the images displayed by the first linearly polarized light P and the second linearly polarized light S, and alternately displays the first image 51 and the second image 52.
  • the human eye can see the first image 51 and the second image 52 at the same time, so that the display image area of the head-up display system is enlarged, and the display with a larger field of view is realized.
  • first angle and second angle are different, so that the first image and the second image can be displayed in different display areas to expand the field of view.
  • difference between the first angle and the second angle described herein may include different directions of the deflection direction of the propagation direction, or different angles of the deflection direction of the propagation direction, or different deflection angles and angles of the propagation direction.
  • the coordinate system used is defined by the plane containing the input and reflected beams. If the polarization vector of the light is in this plane, it is called P polarization, and if the polarization vector is perpendicular to this plane, it is called S polarization.
  • the first linearly polarized light P corresponds to P-polarized light
  • the second linearly-polarized light S corresponds to S-polarized light.
  • the display control module 1 includes an image rendering component 12, a display component 13, a polarization conversion element 14, and a system control component 11.
  • the image rendering component 12 is configured to output a first image in a first period. 51, the second image 52 is output in the second period;
  • the display unit 13 is connected to the image rendering unit 12 for displaying the first image 51 and the second image 52;
  • the polarization conversion element 14 is provided on the image display side of the display unit 13, and
  • the light of the first image 51 is converted into the first linearly polarized light P in the first period
  • the light of the second image 52 is converted into the second linearly polarized light S in the second period
  • the vibration directions of the light S are perpendicular to each other;
  • the system control unit 11 is connected to the image rendering unit 12 and the polarization conversion element 14 for controlling the timing and frequency of the image rendering unit 12 outputting the first image 51 and the second image 52, and controlling the polarization
  • the display control module 1 controls the image rendering unit 12 to output the required image to the display unit 13 at a certain timing and frequency according to the polarization state of the light converted by the polarization conversion element 14.
  • the image light displayed by the display unit 13 enters the polarization conversion element 14, and the polarization
  • the conversion element 14 converts the polarization state of the light passing through it, and changes the light of the image into the first linearly polarized light P or the second linearly polarized light S and outputs it.
  • the light is converted into the first linearly polarized light P and the second linearly polarized light S, and the two are output according to a certain timing and frequency, respectively.
  • the head-up display system further includes at least one reflector 2 disposed on the optical path between the display control module 1 and the polarization beam splitting element 3 (see FIG. 1) for changing the first linearly polarized light P and The propagation direction of the second linearly polarized light S.
  • the reflecting mirror 2 is disposed on the optical path between the display control module 1 and the polarization beam splitting element 3, which can effectively shorten the propagation distance of the optical path, thereby reducing the space occupied by the head-up display system.
  • the reflecting mirror 2 includes at least one of a flat reflecting mirror, a spherical reflecting mirror, an aspherical reflecting mirror, or a free-form reflecting mirror.
  • the head-up display system may include a non-planar mirror, such as a free-form mirror, or a spherical mirror.
  • the head-up display system can also include two or two More than two mirrors 2, including at least one non-planar mirror.
  • two mirrors 2 are set in a head-up display system, one of which is a flat mirror, and the other is an aspherical mirror; and another example is three mirrors 2 in a head-up display system, one of which is a spherical mirror and the other is Aspheric mirrors, the third is a free-form mirror.
  • at least one non-planar mirror 2 is included in this way, so that the mirror 2 can have optical power and the entire optical system can magnify the image.
  • the heads-up display system provided in the embodiment of the present disclosure since the heads-up display system provided in the embodiment of the present disclosure is provided with a polarization beam splitting element 3 and a display method using time division multiplexing, this embodiment uses a reflection of the same caliber as the prior art.
  • Mirror 2 can achieve a larger field of view display.
  • a person skilled in the art may obtain according to the technical solution provided by the embodiment of the present disclosure that when the display field required by the user side is the same, the head-up display system provided by the embodiment of the present disclosure may use a smaller-sized reflection for imaging.
  • Mirror 2 The size of the reflecting mirror 2 in the related art is generally determined according to the field of view angle and the display image distance of the head-up display system.
  • the diameter of the reflector 2 used in the related art is 320cm ⁇ 160cm.
  • a reflector is selected.
  • the size of 2 is 160cm ⁇ 80cm, which significantly reduces the size of the 2 diameter of the mirror. Therefore, the embodiments of the present disclosure can effectively avoid the problem that the size of the optical reflector 2 is too large in a head-up display system with a large field of view, which is difficult to process, manufacture, and detect, which effectively reduces the cost and further reduces the volume of the head-up display system. Reduce the space occupied by the head-up display system in vehicles and other vehicles.
  • the mirror is disposed on the optical path between the display control module and the polarization beam splitting element, that is, before the light is deflected by the polarization beam splitting element in different directions. Therefore, it is possible to obtain a larger range of field of view by using a smaller-diameter mirror.
  • the polarization beam splitting element 3 includes a polarization beam splitting prism, and the polarization beam splitting prism includes two right-angle prisms whose optical axis directions are perpendicular to each other.
  • Polarizing beam splitting prisms are used to separate two kinds of light with different polarization states.
  • they are beam splitting prisms made of materials with birefringent properties, such as Wollaston prisms.
  • the Wollaston prism material is calcite, which is a birefringent crystal material. Please refer to Figure 2.
  • a Wollaston prism is an optical device that can generate two beams of linearly polarized light that are separated from each other and whose vibration directions are perpendicular to each other.
  • n o and n e are the refractive indices of ordinary and abnormal light of calcite, respectively.
  • Calcite is a negative crystalline material, n o > n e .
  • the polarization beam splitting element 3 may be provided with one polarization beam splitting prism as shown in FIG. 2, or two or more polarization beam splitting prisms may be superposed to further expand the separation angle of the two polarization states.
  • FIG. 3 between two adjacent polarizing beam splitting prisms, right-angle prisms with the same optical axis direction are in contact with each other. It can be seen from the figure that the included angle of the two polarized light rays after passing through the two polarization beam splitting prisms is enlarged.
  • the head-up display system further includes a first optical element and a second optical element.
  • the first optical element 41 is disposed on the optical path of the first linearly polarized light P after being deflected, and is configured to convert the first linearly polarized light. P reflects to the human eye;
  • the second optical element 42 is disposed on the optical path of the second linearly polarized light S after being deflected to reflect the second linearly polarized light S to the human eye.
  • the first optical element 41 and the second optical element 42 include a holographic optical element.
  • a holographic optical element is an optical diffractive element made using the principle of optical interference. It can superimpose a reverse aberration on incident light with aberrations to cancel out the aberrations generated by the original optical system.
  • the holographic optical element The diffraction angle of the incident light after passing through the hologram element can be controlled to obtain the required diffraction angle.
  • the holographic optical element can reflect light to a specific angle. The selection of the holographic optical element should be performed according to the required diffraction angle and the aberration of the incident light, so as to meet the correction of the aberration and the required diffraction angle.
  • holographic elements can eliminate the chromatic aberrations produced by the polarization beam splitting element 3 or other aberrations in the optical path of the head-up display system (processing errors of optical components in the optical system or other optical aberrations generated by the optical path itself, which may include spherical aberration , Coma, astigmatism, field curvature, and distortion), and reflects light to the human eye at a predetermined angle, so that the driver can observe the first image 51 and the second image 52 at the same distance from the human eye.
  • the first optical element 41 and the second optical element 42 include a holographic grating.
  • a holographic grating is made from a master grating and subjected to a process similar to a reticle grating.
  • Master holographic gratings are usually made by exposing a photosensitive material to two interference laser beams. The interference pattern appears on the surface as a periodic pattern, and then it can be physically or chemically processed to reveal the surface pattern.
  • the first optical element 41 and the second optical element 42 may be disposed on the windshield glass 6 of the vehicle in which the head-up display system is located, as a matter of course, they may also be disposed on a synthesizer or other suitable components.
  • the time of each display cycle is less than or equal to the response time of human vision persistence, and the output frequency of the first period and the second period are both greater than or equal to twice the refresh frequency of human vision persistence.
  • the first image 51 is displayed in the first period, there is no image in the area where the second image 52 is displayed. Accordingly, when the second image 52 is displayed in the second period, there is no image in the area where the first image 51 is displayed.
  • Each display period is set. The time is less than or equal to the response time of human vision persistence, and the output frequency of the first period and the second period is greater than or equal to the refresh frequency of human vision persistence, which can make full use of the time division multiplexing method and human vision persistence.
  • the advantage of combining retention characteristics is that image conversion is performed at a refresh rate higher than that of human vision persistence, and the first image 51 and the second image 52 are alternately displayed on the display part 13, and the polarization conversion element 14 is also performed at the same frequency.
  • the polarization state of the light is converted so that the first image 51 displayed by the first linearly polarized light P is output during the first period, and the second image 52 displayed by the second linearly polarized light S is output during the second period, although the two images are not output at the same time,
  • the human eye has visual persistence characteristics, when two images are output alternately at high frequencies, the human eye can observe two display images at the same time, forming a large field of view. Display image.
  • an embodiment of the present disclosure further provides a head-up display method, including a plurality of display periods, each display period including a first period and a second period.
  • the first linearly polarized light P required for an image 51 deflects the propagation direction of the first linearly polarized light P by a first angle, and reflects the first linearly polarized light P to the human eye; in the second period, outputs the intended display
  • the second linearly polarized light S required by the second image 52 deflects the propagation direction of the second linearly polarized light S by a second angle, and reflects the second linearly polarized light S to the human eye.
  • the system control unit 11 in the display control module 1 controls the image rendering unit 12 to generate an image that needs to be displayed by the first linearly polarized light P. Displayed on the display unit 13.
  • the system control unit 11 controls the polarization conversion element 14 to change the polarization state of the light passing through the polarization conversion element 14 into the required first linearly polarized light P, and after being reflected by the mirror 2, it enters the polarization beam splitting element 3 and the first linearly polarized light After passing through the polarization beam splitting element 3, P is deflected at a certain angle, and then reflected by the first optical element 41 and enters the human eye, so that the human eye can observe the first image 51.
  • the process described in the first period is performed on the image displayed by the second linearly polarized light S so that human eyes can observe the second image 52.
  • the human eye observes the first image 51 and the second image 52 at the same time, forming a display image with a large field of view.
  • the display component 13 may be an organic light emitting diode display device, a liquid crystal display device, or the like, which is not particularly limited in the embodiments of the present disclosure.
  • a display image with a large field of view can be displayed in a vertical direction or a horizontal direction.
  • the first linearly polarized light P and the second linearly polarized light S are deflected in opposite directions in the vertical direction, and the first image 51 and the second image 52 can be displayed in the vertical direction.
  • the first linearly polarized light P and the second linearly polarized light S can be opposite in the horizontal direction.
  • the directions are deflected to display the first image 51 and the second image 52 in the horizontal direction (as shown in FIG. 6).
  • the display of the first image 51 and the second image 52 in different display areas may be arranged along a predetermined direction, so that the first image 51 and the second image 52 may be combined into a larger image to expand the field of view.
  • the first image 51 and the second image 52 may partially overlap, or they are in contact with each other but do not overlap, or there is a certain distance between the first image 51 and the second image 52.
  • the predetermined direction in which the first image 51 and the second image 52 are aligned is not particularly limited, and for example, it may be a direction parallel or perpendicular to the line connecting the eyes of the user.
  • the time of each display cycle is less than or equal to the response time of human vision persistence, and the output frequency of the first and second periods is greater than or equal to the refresh frequency of human vision persistence. Twice.
  • the head-up display system may include: a control element 110, a display source 120, a first polarization conversion element 130, an optical path separator 140, a first reflector 150, a second reflector 150 ', The collimator 160, the image rendering circuit 170, and the aberration compensation circuit 180.
  • the viewing position of the driver of the motor vehicle is also schematically drawn using human eyes.
  • the propagation path of the light emitted by the display source 120 in the entire system is shown by means of arrows.
  • the positions of the various components shown with respect to the propagation path of the light in FIG. 7 do not represent any limitation to the present disclosure. Without departing from the spirit and principle of the present invention, those skilled in the art should be able to flexibly arrange the various components as required.
  • the display source 120 in this embodiment may be a display component
  • the control element 110 may be a system control component
  • the optical path separator 140 may be a polarization beam splitting element.
  • the windshield 100 is a transflective element.
  • a transflective element that reflects the first linearly polarized light and the second linearly polarized light into the user's eyes and is imaged in the user's eyes can be used with the head-up display system in this application.
  • the head-up display system of the present application can also be applied to a train or an aircraft (such as an airplane).
  • the display source 120 may be configured to emit coded light. That is, display information may be encoded in the light emitted by the display source 120. Such display information may be generated by the image rendering circuit 170 and input into the display source 120.
  • the image rendering circuit 170 may also receive an aberration compensation signal from a further optional aberration compensation circuit 180, wherein the aberration compensation signal is configured to compensate for the light emitted by the display source 120 during the propagation process in the entire system.
  • the generated aberration for example, aberration caused by a light angle changing element
  • the light angle changing element includes, but is not limited to, a light path separator and a collimator.
  • the control element 110 controls the entire head-up display system during the first and second timings that alternate with each other, and in particular, controls the first polarization conversion element 130 so that a user (for example, a driver of a motor vehicle) can Different linearly polarized light containing different display information is seen during and second timing respectively.
  • the first polarization conversion element 130 may be a combination element of a polarizer and an electro-optic crystal element.
  • the control element 110 may control the first polarization conversion element 130 to receive the collimated light from the collimator 160 and convert it into the first linearly polarized light.
  • the control element 110 may also control the image rendering circuit 170 during the first timing sequence, so that the image rendering circuit 170 generates the first display information and provides it to the display source 120.
  • the display source 120 will generate light containing the first display information during the first timing sequence.
  • the first linearly polarized light output from the first polarization conversion element 130 will include the first display information.
  • the control element 110 may control the first polarization conversion element 130 to receive the collimated light from the collimator 160 and convert it to a direction perpendicular to the polarization direction of the first linearly polarized light as described above.
  • the second linearly polarized light may also control the image rendering circuit 170 during the second timing sequence, so that the image rendering circuit 170 generates second display information different from the first display information, and changes It is provided to the display source 120.
  • the display source 120 will generate light containing the second display information during the second timing sequence.
  • the second linearly polarized light output from the first polarization conversion element 130 will correspondingly include the second Display information.
  • the collimator 160 may be further configured to compensate for system aberrations.
  • the diffractive optical element has aberration characteristics opposite to that of the refractive prism, in such a collimator 160, the diffractive optical element can be used for compensation of aberrations.
  • multilayer diffractive optical (DO) lenses can be used.
  • the first display information may be selected as vehicle state information, such as vehicle speed, oil temperature, water temperature, and the like
  • the second display information may be selected as augmented reality information, such as instruction information of external objects, navigation information, and the like.
  • the first polarization conversion element 130 provides two kinds of linearly polarized light, such as s-polarized light and p-polarized light, during the first and second timings, respectively. And these two types of linearly polarized light can also contain different display information.
  • the first linearly polarized light or the second linearly polarized light will reach the optical path separator via the optional first and second mirrors 150 and 150 ', respectively. 140.
  • the two mirrors 150, 150 ' can also be omitted as needed, or the number becomes more or less, such as one, three, or the like.
  • the reflecting mirrors 150 and 150 include at least one of a flat reflecting mirror, a spherical reflecting mirror, an aspherical reflecting mirror, or a free-form reflecting mirror.
  • the head-up display system may include a non-planar mirror, such as a free-form mirror, or a spherical mirror.
  • a non-planar mirror such as a free-form mirror, or a spherical mirror.
  • the head-up display system can also include two or two
  • the above mirrors include at least one non-planar mirror.
  • two mirrors are set in a head-up display system, one of which is a flat mirror, and the other is an aspherical mirror; and another example is three mirrors in a head-up display system, one of which is a spherical mirror and the other is an aspheric Mirror, the third is a free-form mirror.
  • at least one non-planar mirror is included, so that the mirror can have optical power and the entire optical system can magnify the image.
  • FIG. 8 schematically illustrates a composition diagram of a head-up display system after adding a second polarization conversion element 190 according to an embodiment of the present disclosure.
  • a second polarization conversion element 190 is provided.
  • the second polarization element 190 is under the control of the control element 110 and does not change the s-polarized light in the first timing of time division multiplexing. In the second timing sequence, p-polarized light is changed to s-polarized light.
  • the deflection direction of the first linearly polarized light P and the second linearly polarized light S is adjusted by the optical path separator 140, so that the two beams of S-polarized light passing through the second polarization conversion element 190 can have different angles, and can be realized in a vertical direction or A display image with a large field of view is displayed in the horizontal direction. As shown in FIG. 9, the two S-polarized lights are deflected in the vertical direction in opposite directions, and the first image 51 'and the second image 52' can be displayed in the vertical direction. Keeping the plane of the bottom surface of the optical path separator 140 in FIG.
  • rotating the optical path separator 140 clockwise / counterclockwise by 90 ° can deflect the two beams of S-polarized light in opposite directions in the horizontal direction so as to horizontally
  • the first image 51 'and the second image 52' are displayed in directions (as shown in FIG. 10).
  • the relative positional relationship of the aforementioned images 51 'and 52' can also be changed.
  • the above-mentioned images 51 'and 52' are arranged in a certain direction or they are partially overlapped.
  • FIG. 11 and FIG. 12 schematically illustrate the light deflection of the s-polarized light and the p-polarized light after passing through the optical path separator and the second polarization conversion element at the first timing and the second timing, respectively.
  • the s-polarized light has higher reflectivity on the windshield than the p-polarized light within a certain range of incident angles
  • the polarization state of the light becomes s-polarized light.
  • the windshield 100 obtains a larger reflectivity, which increases the eye-brightness of the head-up display, thereby effectively reducing the brightness of the backlight source and reducing the power consumption of the entire head-up display system.
  • FIG. 13 schematically illustrates a case where a driver's field of view is enlarged by time division multiplexing of a polarization state.
  • FIG. 14 shows the relationship between the reflectance of the S-polarized light and the P-polarized light as a function of the angle of incidence.
  • the angle between the windshield and the horizontal plane is about 25 to 35 degrees.
  • the head-up display has a downward viewing angle of about 5 degrees. Therefore, the incident angle of the light from the head-up display system on the windshield is about 60 to 70 degrees.
  • the reflectances of the S and P polarized light are greatly different at an angle of incidence of 60 to 70 degrees. Therefore, converting the P-polarized light into the S-polarized light through the second polarization conversion element 190 can increase the brightness of the entire image and can reduce power consumption.
  • the second polarization conversion element 190 in the head-up display system according to this embodiment can also be applied to the embodiment shown in FIG. 1.
  • the second polarization conversion element 190 may be disposed on the light exit side of the polarization conversion element 3.
  • the head-up display method in the above embodiment may also be deflected by the first linearly polarized light for a first angle and reflected to the human eye during the first period. Changing the polarization direction of the first linearly polarized light to the same polarization direction as the second linearly polarized light; or, in the second period, after the propagation direction of the second linearly polarized light is deflected by a second angle and reflected Before the human eyes, the polarization direction of the second linearly polarized light is changed to the same polarization direction as the first linearly polarized light.
  • An embodiment of the present disclosure also provides a vehicle, such as a car, a train, an airplane, or the like, including the head-up display system described in the above embodiment.
  • the beneficial effects produced by the above-mentioned vehicles are the same as the beneficial effects of the head-up display system in this embodiment, and are not repeated here.
  • An embodiment of the present disclosure also provides a computer product including one or more processors configured to execute computer instructions to perform one or more steps in the head-up display method described in this embodiment.
  • An embodiment of the present disclosure further provides a computer-readable storage medium for storing non-transitory computer-readable instructions, and when the non-transitory computer-readable instructions are executed by a computer, a heads-up display according to this embodiment is performed.
  • a computer-readable storage medium for storing non-transitory computer-readable instructions, and when the non-transitory computer-readable instructions are executed by a computer, a heads-up display according to this embodiment is performed.
  • a module or component may be implemented at least in part by software so as to be executed by various types of processors.
  • an identified executable code module may include one or more physical or logical blocks of computer instructions, which may be constructed, for example, as an object, procedure, or function. Nevertheless, the executable code of the identified modules does not need to be physically located together, but may include different instructions stored in different physics. When these instructions are logically combined, they constitute a module and achieve the stated purpose of the module .
  • an executable code module can be a single instruction or many instructions, and can even be distributed across multiple different code segments, among different programs, and across multiple memory devices.
  • operational data may be identified within a module, and may be implemented in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed in different locations (including on different storage devices), and at least partly may exist on the system or network only as electronic signals.
  • the module or component can be implemented by software, taking into account the current level of hardware technology, a module that can be implemented by software can be constructed by a person skilled in the art to implement the corresponding hardware circuit without considering the cost.
  • the hardware circuit includes a conventional very large scale integration (VLSI) circuit or a gate array, and an existing semiconductor such as a logic chip, a transistor, or other discrete components.
  • VLSI very large scale integration
  • Modules can also be implemented with programmable hardware devices, such as field programmable gate arrays, programmable array logic, and programmable logic devices.
  • the modules or components in some embodiments of the present application may be dedicated hardware devices for implementing some of the modules or components described above or All functions.
  • the above-mentioned module or component may be a circuit board or a combination of multiple circuit boards for implementing the functions described above.
  • the one or more circuit boards may include: (1) one or more processors; (2) one or more non-transitory computer-readable devices connected to the processors Memory; and (3) processor-executable firmware stored in the memory.
  • the above modules or components may also be a combination of a memory, a processor, and other hardware components.
  • the display control module may include a memory storing instructions and / or data, a processor that processes data signals, and a display component such as a display.
  • an embodiment of the present disclosure further provides a head-up display device including one or more processors and one or more memories.
  • the processor can process data signals and may include various computing structures, such as a complex instruction set computer (CISC) structure, a structured reduced instruction set computer (RISC) structure, or a structure that implements a combination of multiple instruction sets.
  • the memory may store instructions and / or data executed by the processor. These instructions and / or data may include code for implementing some or all functions of one or more devices described in the embodiments of the present application.
  • the memory includes dynamic random access memory (DRAM), static random access memory (SRAM), flash memory, optical memory, or other memories well known to those skilled in the art.
  • the processor may be a central processing unit (CPU) or other form of processing unit with data processing capabilities and / or program execution capabilities, such as an image processing unit (GPU), a field programmable gate array (FPGA), or a tensor processing unit ( TPU), etc .; for example, the central processing unit (CPU) can be X86 or ARM architecture and so on.
  • the head-up display device may further include other components such as a display, and the processor may control other components in the head-up display device to perform a desired function.
  • the memory may include any combination of one or more computer program products, and the computer program product may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory.
  • the volatile memory may include, for example, a random access memory (RAM) and / or a cache memory (cache).
  • the non-volatile memory may include, for example, a read-only memory (ROM), a hard disk, an erasable programmable read-only memory (EPROM), a portable compact disk read-only memory (CD-ROM), a USB memory, a flash memory, and the like.
  • One or more non-transitory computer-readable instructions may be stored on a computer-readable storage medium, and the processor may run the non-transitory computer-readable instructions to implement various functions of the image processing apparatus.
  • the computer-readable storage medium may also store various application programs and various data, and various data used and / or generated by the application programs.
  • the above-mentioned module or component (for example, a system control component) includes code and a program stored in a memory; a processor may execute the code and program to implement the module or the component as described above. Some or all functions.
  • Some embodiments of the present application further provide a computer-readable storage medium for storing non-transitory computer-readable instructions, and performing the above-mentioned head-up display method when the non-transitory computer-readable instructions are executed by a computer.
  • the computer-readable storage medium may be a memory in the above-mentioned head-up display.

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Abstract

L'invention concerne un système et un procédé d'affichage tête haute, un véhicule, et un produit informatique. Le système d'affichage tête haute comprend : un module de commande d'affichage (1) configuré pour, dans une première période de temps, émettre une première lumière polarisée linéairement (P) pour afficher une première image (51) et pour, dans une seconde période de temps, émettre une seconde lumière polarisée linéairement (S) pour afficher une seconde image (52) ; et un élément de division de lumière de polarisation (3) disposé sur un trajet d'émission de lumière du module de commande d'affichage (1) et configuré pour amener une direction de propagation de la première lumière polarisée linéairement (P) à dévier selon un premier angle et pour amener une direction de propagation de la seconde lumière polarisée linéairement (S) à dévier selon un second angle, le premier angle étant différent du second angle de sorte qu'une zone d'affichage d'image du système d'affichage tête haute peut être agrandie et que la vision peut être élargie.
PCT/CN2019/089439 2018-05-31 2019-05-31 Système et procédé d'affichage tête haute, véhicule, dispositif d'affichage tête haute, et support de stockage lisible par ordinateur Ceased WO2019228488A1 (fr)

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EP19811615.4A EP3805843B1 (fr) 2018-05-31 2019-05-31 Système d'affichage tête haute et véhicule
US16/633,599 US11320901B2 (en) 2018-05-31 2019-05-31 Head-up display system and display method, vehicle, head-up display device, and computer-readable storage medium

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